Malicious PDF — malware analysis report

Static analysis result for SHA-256 addc9f52b5f8e084…

MALICIOUS

PDF

94.6 KB Created: 2021-03-24 04:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b2e0eba662cc93f04fd9989d1cfcd101 SHA-1: b4169684db6cda8eb86edbb16862aeb3b47bdd29 SHA-256: addc9f52b5f8e084584db38d9e63e08a6982b69104768809ac62b2b7552ed9ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with one specifically identified as a lure for 'functional dependency in database with example pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous links to potentially disposable hosting services further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/award?keyword=functional+dependency+in+database+with+example+pdf PDF link annotation
    • https://cdn.sqhk.co/gixotagokezu/Urlxjfm/life_is_strange_comic_issue_12.pdfIn PDF document text
    • https://cdn.sqhk.co/nisifowisom/ihfggjg/8466972494.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/valoweb.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/yahoo_application_free.pdfIn PDF document text
    • http://yourcy.com/mens_mountain_bike_helmet_reviewsklbfc.pdfIn PDF document text
    • http://demask.space/192619816149i7uj.pdfIn PDF document text
    • http://muldwych.com/jepiloxasozag40if5.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/hjck3WL/62189350468.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/yellow_frog_tape_lowesmkitr.pdfIn PDF document text
    • https://cdn.sqhk.co/zesozote/KVjejgG/dragon_head_castle_crashers.pdfIn PDF document text
    • http://nowuweg.iblogger.org/is_there_a_grace_period_for_illinois_license_plate_renewal.pdfIn PDF document text
    • http://zotusomadelisok.22web.org/bexigakotoxuf.pdfIn PDF document text
    • http://rifepijogen.iblogger.org/pharmacotherapy_a_pathophysiologic_approach_9th_edition.pdfIn PDF document text
    • http://lebadatow.22web.org/dell_u2715hc_review.pdfIn PDF document text
    • http://grenkasalo4.xyz/mojune40fyh.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/gXigbib/desavepagur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_099d91c10f094e36bb2cd90c84880786.pdf?index=trueIn PDF document text
    • http://giwijivesugamez.epizy.com/kepisiri.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_a02084c1c7254ab2977018d44d713e8c.pdf?index=trueIn PDF document text
    • http://damewanobojojo.rf.gd/59817100902.pdfIn PDF document text
    • http://bafopivazizaxon.rf.gd/the_arrl_antenna_book_for_radio_communications.pdfIn PDF document text
    • http://livofikozenaduj.rf.gd/20090291149.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_e08ce76b7fc14a11ac2ca47cb08176d9.pdf?index=trueIn PDF document text
    • http://gerinaselamezos.rf.gd/how_to_tell_if_pool_booster_pump_is_bad.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_9f0e95b6786d4376bc6420cfce60fbdf.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_01bc3747a8c24484958a14a828f29c0a.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 5656 bytes
SHA-256: 4a4d5cecb83078cf7be0de483d29b42a994182b309218ff354e524ed12c583a9
font_01_sfnt_off00011e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2E 6068 bytes
SHA-256: cb159cc9d714520fdf604515834a8e5d6ccdf81551317d8133b939af7313f940
font_02_sfnt_off00012dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDE 11288 bytes
SHA-256: 49ffefff1e7ff9b83a7ab02b228d9c31e4d80d586dc2980a63f7c8ad573bd49d
font_03_sfnt_off000154ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154EE 16512 bytes
SHA-256: a3f15b1c9cd1f26f3aac6c3d2e5cf365da7ac98d39dd60a92a2726d943f36451